In: Mechanical Engineering
Q2 A single stage nozzled axial flow gas turbine operates with
1000 K total inlet temperature and 4.8 bar inlet total pressure
with 12 kg/s mass flow rate. The axial velocity throughout the
stage is constant at 220 m/s and the blade speed is 350 m/s. The
nozzle exit and the rotor exit angles are 65° and 7° respectively.
The static pressure at the exit of the stage is 2.5 bar. Assuming
equal inlet and exit absolute flow velocities, determine: (i)
relative flow angle at rotor inlet; (ii) relative velocity at stage
inlet; (iii) relative flow angle at rotor exit; (iv) relative
velocity at stage exit; (v) absolute flow velocity; (vi) degree of
reaction; and (vii) specific power output of the turbine